In a mixing bowl, combine the black beans, sliced zucchini, radishes, olive oil, black pepper, garlic powder, salt, and lime juice. Mix well until all ingredients are coated.
Heat a skillet over medium heat. Once hot, add the black bean mixture to the skillet and cook for about 10 minutes, stirring occasionally, until the zucchini is tender and everything is heated through.
While the mixture cooks, prepare the lettuce leaves as wraps.
Once the mixture is ready, remove it from the heat and let it rest for 5 minutes.
Spoon the warm black bean and zucchini mixture into the prepared lettuce leaves, neatly folding them into wraps.
Serve immediately, garnished with optional cilantro or avocado if desired, and alongside a simple salad and lime wedge.
